Wax paper machine



Oct. 5, 1937. LE R Y F, CARKHUFF 2,095,123

WAX PAPER MACHINE Filed Aug. 17, 1935 5 Sheets-Sheet l 18/20 Fay/muff [EUGENE f Get. 5, 1937.

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lllll Patented Oct. 5, 1937 UNITED STATES PATENT OFFICE WAX PAPER- MACHINE Le Roy F. Carkhuff, Morris, Ill., assignor to Self- Locking Carton 00., Chicago, 111., a corporation of Illinois The present invention pertains to devices for producing rolls from webs of various materials, and has particular reference to an improved machine for forming rolls from webs such as of wax paper.

It is customary to market wax paper in small rolls adapted for household use, and as the wax paper is produced in large rolls, it is necessary to unwind the large roll and produce therefrom a plurality of smaller rolls of household size.

A principal object of the present invention is the provision of an improved device for producing in a highly efficient manner small rolls from a traveling web of material.

An additional object is to provide a substantially continuously operating roll-forming machine adapted to pick up and secure the forwardly traveling end of a web of paper or similar material and to wind the web into roll form.

A still further object is the provision of a roll-forming machine having a centrifugally operated winding means for securing the loos end of a traveling web.

These and other objects will be evident upon a consideration of the following specification and by reference to the accompanying drawings, in which Fig. 1 is a side view of a device constructed in accordance with my invention;

Fig. 2 is a view of the machine shown in Fig. 1

taken from the opposite side thereof;

Fig. 3 is a top view of the machine shown in Fig. 1;

Fig. 4 is a fragmentary end view of the machine showing in greater detail the roll-forming unit thereof;

Fig. 5 is a fragmentary side'view showing the roll-forming drive and break mechanism;

Fig. 6 is a view showing the cam arrangement for actuating the winding rolls;

Fig. '7 is a detailed view, partially in section, showing the roll-winding head;

Fig. 8 is an end section of a winding roll;

45 Fig. 9 is a fragmentary end view of a roll-forming unit;

Fig. 10 is a sectional view of the unit shown in Fig. 9 taken along line Ill-40 of Fig. 11;

Fig. 11 is a cross-sectional view taken along line IIII of Fig. 10; and

Fig. 12 is a view similar to Fig. 11 showing the web-engaging units in retracted position.

As shown in the drawings, the device is constructed about an upstanding frame member ID 55 having a power-imparting motor II positioned therebeneath. Preferably, the motor is provided with a conventional magnetic brake device.

At the feed end of the frame In a relatively large roll I2 of a web I3 is rotatably mounted by means of the shaft I4 and U-shaped bearing 5 members I5 mounted on the frame. The web I3 passes over a roller I3 mounted on an upstanding frame unit I7, and beneath a second roller I8, which is carried on a swing arm I9. The swing arm I9 is pivoted to the frame II! at 20 10 and has a lower arm 2i which is connected to a pivoted L-shaped brake-actuating arm 22 by means of rod 23; Arm 22 is pivoted to the frame member II! at 24 and has an upper arm 25 connected to the jaws 26 and 21 of a brake mecha- 15 nism by means of rod 28 and lever 23, as shown in Fig. 2. As long as the web I3 remains taut the lever I9 is maintained in upraised position and the jaws 26 and 21 are spread apart sufiiciently to permit free rotation of the roll I2. 20 Breakage of the web I3 causes the lever I9 to fall downwardly and the jaws 26 and 21 are brought together to stop rotation of the roll l2.

The web I3 passes from the roller I8 between an upper rubber-faced feed roll 30 and a lower 25 steel feed roll 3|. The lower feed roll has a shaft 32, each end of which is journaled in opposite frame units 33 mounted on the'frame III. A sprocket 34 is secured to one end of the shaft 32 andcarries a chain 35. The other end of the, 30 chain 35 passes over a sprocket 36, which is mounted on shaft 31. The shaft 31 extends transversely of the frame member I0 and carries a pulley 38 upon which ridesthe belt 39, the latter being driven by motor II, as shown in Fig. 2. The upper drive roll 30 has a shaft 40. each end of which is journaled in the oppositely positioned frame units 33. Spring members 4| maintain the upper draw roll in frictional engagement with the lower draw roll to provide the necessary driving power. One end of the shaft 40 has a gear 42 of a pitch diameter equal to the diameter of the roll meshing with a gear (not shown) keyed to shaft 32 and provided with a pitch diameter equal to the diameter of the lower roll. In this manner the two rolls are driven at the same peripheral speed, even though the rolls are of different diameters.

Beyond the draw rolls is a second web control unit which automatically stops the machine when the web breaks. This unit consists of a light weight arm M pivoted to the frame member 33 at 45 and having an upwardly extendi g circuit breaker arm 46 which is adapted upon downward motion of the arm 44 to press against the lever 41. Lever 41 is pivoted to a stationary frame member 48 at 49. The upper portion of the lever 41 has a contact point 50 which engages a similar point 5I on stationary arm 52. The contact points 50 and 5| are normally maintained in contact by action of the spring 53 secured to the upper portions thereof. The circuit which operates motor II passes through the conduit 54 and the contact members 50 and 5| are wired in series in this circuit. Breakage of the web I3 causes the arm 44 to drop by gravity and the lever arm 46 presses the arm 41 outwardly so that the contact points 50 and 5| are broken and the motor stops.

As it is desirable to obtain access to the machine at the draw rolls for such purposes as threading the web through the machine, there is provided a hand-operated lever 55 by which arms 56 and 51 may be moved in a reciprocal manner to rotate shaft 58. Shaft 58 extends transversely of the machine and is provided with cam units 59. These cam units raise and lower the upper draw roll 30 in an obvious and well known manner.

After passing through the draw rolls the web I3 travels through the idlers 60 and into the roll-forming unit. This unit consists of rotatable winding rolls 6| and 62 which are secured at one of their ends to a revolving roll carrierframe 63, the roll 6| being carried by arm 64 and the roll 62 being carried by arm 65. The frame 63 is keyed to shaft 66 which is rotated by means of gear 61 and worm gear 68 meshing therewith. One end of the shaft 66 is jour-.

naled in the frame unit 69 and an intermediate portion of the shaft is journaled in the frame unit I0. Worm gear 68 is carried on a shaft II which is actuated by chain 12 and sprocket 40 wheels 13 and I4, the latter being secured to shaft I5. To the opposite end of shaft 15 is secured a pinion gear I6 which is driven by a similar pinion I1 carried on shaft I8. Shaft 18 is provided with a gear 19 meshing with a gear 45 on shaft 31. It will be seen that the drive arrangement for shaft 66 is suchthat a relatively slow rate of rotation is provided.

Shaft 66 also carries a cam BI, and this cam acts to operate a cutting unit for severing the 50 web I3 when the roll of the desired size has been and 84 travels. on the cam.

55 rollers are tripped by the cut-away portions 81 and 88 and the weight of the cam arm and the knife arm 86 causes the serrated knife 89 which is attached to the latter tofall into cutting relation with the web I3, as will be seen in Fig. 5.

0 The knife 89 cuts the web adjacent the L-arms 90 and 9| which are secured to an extension of the shaft 66. To protect the cam and cam rollers against undue jar when tripped by the cam, an extension 92 is secured to the end of the cam 5 roller arm 82-, and a nut 93 secured to this ex tension engages the sleeve or journal I0 to prevent the rollers 83 and 84 from striking the high portion of the cam. Shaft is assisted in its cutting operation by a spring 94 which in- 70 sures rapid operation of the cutting knife.

Two cam rollers are employed due to the sharp angle of the cut-away portions of cam 8| thereby preventing the first roller from being caught behind the edge of the cam as the ,rollers reach 7 the outside 01' the cam, That is, the second earn roller lifts the first cam roller over the sharp edge of the cam as the latter rotates.

The angle bars and 9I do not cut the paper,

but do maintain the Web in taut condition at the moment of impact of the serrated knife 89.

The shaft 85 also carries an arm 95 provided with a transversely extending shaft 96 and a series of rubber-faced rollers 91. As shown in Fig. 5, the forward edge of the severed web I3 is pressed downwardly against the winding rolls at the cutting interval by the rubber-faced rollers 91, thereby initiating the winding of an additional roll.

The winding rolls 6| and 62 are provided with outer barrel portions 98 and these portions have four slots 99 extending longitudinally thereof. End caps I00 form a closure for the winding rolls and space the barrel portions from the shaft sections IOI. Interiorly of the barrel portions 98 are shafts I 0| which are grooved to receive longitudinally extending bearing rods I02. Mounted to the outer portions of the bearing rods I02 are the notched gripper knives I 03, as will be-seen in Figs. 9, 11 and 12. Bearing rods I02 are free to rotate in their slots in the shaft IOI and as the winding rolls are rapidly rotated the gripper knives I03 are caused to project outwardly through the openings 99 in the manner shown in Fig. 11. In their inner and inoperative position the knives I03 recede to the position within the outer shells 98, to allow removal of the roll of paper from the winding mechanism by hand.

The barrel portions 98 have abutting portions I04. The winding units are mounted on the arms 64 and65 by means of ball bearing units I05 and I06 which permit the winding units to be rotated easily and rapidly. Adjacent the ball bearing units I06 are the brake drums I0I which are keyed to the shafts IOI in the manner shown in Fig. 7. The ends of the shafts I 0| are provided with a drive mechanism. This drive mechanism includes an outer pulley portion I08 into the central portion of which is secured a bearing sleeve I09, the latter being free to rotate on shaft IOI. Adjacent and rotating with the pulley I08 is another pulley portion I I0. Bolts III extend through the pulley portion I I0 and screw into pulley I08. These bolts carry .clutch plates I I2. On the end of shaft IN is keyed an internal clutch plate holding member I I3 through which extend bolts II4. These bolts carry clutch plates H5, and the latter are in interleaved relation with respect toplates II 2. The frictional engagement of these two sets of clutch plates is controlled by As the shaft 66 is rotated, the pulley units I08 and H0 will come in contact with the drive belt I I8 as shown in Fig. 2, thereby causing the winding unit to rotate rapidly. This belt is mounted about a pulley H9, and the latter is keyed to a shaft I20 which is driven from sprocket I2I by the chain I22. Chain I22 is driven by sprocket I23 mounted to shaft 31. The belt II8 passes about an outer guide pulley I24 and beneath a slack pulley I25 carried on the arm I26. The slack pulley is maintained in engagement with the belt by means of a pull spring I21, thereby insuring that the tension on the belt is substantially uniform at all times and providing for Van.- riations in the effective length of the belt.

The serrated knifegrippers I03 are thrust outwardly by the centrifugal action accompanying rotation of the winding units and engage the forward edge of the traveling web. Continued rotation of the winding unit causes the desired length of the web to be Wound about the barrel 98 of the winding unit. By the time the winding unit reaches the position shown in Fig. 5 the desired amount of the web has been wound into roll form and the cutting unit is tripped by the cam 8I. At this time the brake drum I01 which is keyed to shaft IOI engages the stationary brake band I28, thereby stopping rotation of the winding member. As the brake drum I'I is'keyed to shaft IN, the latter is held against rotation when the drum I0I is in contact with the brake shoe I28. The belt H8 continues to rotate the pulley portions I08 and H0 for a short period of time after the brake shoe is reached. The en.- gagement of the braking elements is suiiicient to hold the inner clutch plates II against rotation, thereby permitting the outer clutch plates II2 to slip without imparting rotation to shaft IOI.

Brake shoe I28 is mounted on a frame member I29 and is made resilient by means of springs I30 and I3I.

As the winding operation is completed on the roll 6| the roll 62 has been brought into engagement with belt II8 as shown in Fig. 5 and the cycle of operation again is initiated.

In the operation of the device a Web is passed from roll I2 above the roller I8 and beneath the braking unit roller I8. The amount of slack between the roller I6 and the draw rolls determines the position of the roller unit I8 and consequently the amount of braking or hold back of the roll. If the web slackens the arm I9 is depressed and a certain amount of braking is provided by the jaws 26 and 21 to insure the proper speed of rotation of the roll I2. The draw rolls progress the web past the idler or guide rolls 60 and into the roll-winding mechanism. Considering the position shown in Fig. 5 as the initial stage in the operation of the device the severed end of the web is pressed downwardly adjacent the barrel 98 of the winding roll and as the latter is whirling at a rapid speed the knife grippers 'I03 having serrated tooth edges strike the trailing edge of the paper and penetrate sufficiently to grip the paper and insure its being wound upon the roll. The cam 8| causes the cutting unit to raise and the winding roll 82 is progressed in a circular path about shaft 66 to a position adjacent the brake shoe I28, this position being indicated by the roll BI in Fig. 5. At this time the desired amount of the web will have been wound into roll form and the cutting unit will again descend to sever the web and to start the repetition of the cycle of winding and cutting.

Engagement of the brake drums I0I of the winding rolls with the brake shoe I28 during the inoperative position of the winding unit allows a sufiicient period of time for the operator to remove the wound roll by hand. As the rotation of the winding roll is stopped by the brake shoe I28 the gripper knives I03 retract within the shell 98, thereby permitting easy withdrawal of the roll from the free end of the winding roll. In one embodiment of the device, the speed of operation is maintained so that an operator will have time to grasp a wound roll of wax paper, withdraw it from the barrel 98, and place in a suitable container by the time the next wound roll is in position for removal. Thus, it will be seen that the winding units rotate quite rapidly about the shafts IOI while the arms 64 and 65 rotate relatively slowly about the shaft 65. The angle irons 90 and 9I rotate with the shaft 66 and present a taut web to the blade 89 at the cutting interval. The severed end of the web is maintained in contact with the whirling winding units for a sufiicient period of time to allow the gripper knives to engage the web. Thus, the web always is maintained in its extended position, and the cutting and winding operation is continuous. The device is simple in construction and permits of rapid formation of rolls with a minimum loss of time due to such factors as web brakes and adjustments.

An additional advantage of my improved rollforming device lies in the relatively high speeds of operation possible. The web may travel at a speed of approximately '750feet per minute, and the individual rolls may be of a length of the order of 30 to 60 feet. Thus, 25 or 30 rolls or more may be formed per minute. The winding sprocket will make one revolution for each two rolls formed. As the roll-winding units may have a diameter of less than two inches, it will be seen that the units rotate at a high speed which may be of the order of 1850 R. P. M.

It will be seen that many changes may be made in the device described herein for purposes of illustration and explanation, and all such changes and modifications coming within the scope of the invention are intended to be included in the appended claims.

I claim:

1. In a device for forming rolls from a web of paper, means for feeding a traveling web, a central shaft rotatable at a relatively slow speed and to sever said web when a roll has been formed.

2. In a device for forming rolls from a web, means for feeding a web, a continuously and relatively slowly rotating carrier adjacent the path of travel of said web, a plurality of Winding rolls on said carrier, means for rapidly rotating said rolls, means for attaching the end of the web to said rolls, knife members mounted on said carrier and rotatable therewith, and a reciprocal cutting unit cooperable with said knives for cutting said web between adjacent rolls.

3. In a device for forming rolls from a web, means for feeding a web, a relatively slowly rotating carrier adjacent the path of travel of said web, a plurality of winding rolls on said carrier, means for rapidly rotating said rolls, means for attaching the end of the web to said rolls, a cutting member associated with said carrier, and a reciprocal cutting member independent of said carrier and cooperable with said first cutting member for severing said web between adjacent rolls.

LE ROY F. CARKHUFF. 

